Gini coefficient (hereafter GINI;
[1]}, [2]}). This parameter has been adopted from
the economic statistics [3]} and is now used in astronomy
to describe the distribution of light among the pixels associated with
a galaxy. If \(n\)  is the number of pixels assigned to a galaxy,
\(f_{i}\)  the flux from pixel \(i\)  (ordered in such a way that \(f_{ i}\) 
increases with the pixel index), and \(\bar{f}\)  the mean values of the
pixel, GINI parameter can be defined as:
\(GINI=\frac{1}{|\bar{f}|n(n-1)}{\Sigma ^{n}_{i}}{(2i-n-1)|f_{i}|}.\) 
